A5101517277- Nuclear physics research studies
- Particle accelerators and beam dynamics
- Nuclear Physics and Applications
- Atomic and Subatomic Physics Research
- Quantum optics and atomic interactions
- ZnO doping and properties
- Particle Accelerators and Free-Electron Lasers
- Cold Atom Physics and Bose-Einstein Condensates
- Nuclear reactor physics and engineering
- Neutrino Physics Research
- Atomic and Molecular Physics
- Plasma Diagnostics and Applications
- Superconducting Materials and Applications
- Copper-based nanomaterials and applications
- Electronic and Structural Properties of Oxides
- Nuclear Materials and Properties
- Astronomical and nuclear sciences
- Particle physics theoretical and experimental studies
- Ga2O3 and related materials
- Advanced Chemical Physics Studies
- Muon and positron interactions and applications
- Quantum Chromodynamics and Particle Interactions
- Chemical Reactions and Isotopes
- Viral gastroenteritis research and epidemiology
- Respiratory viral infections research
National Institute of Cholera and Enteric Diseases
2022-2025
University of Gour Banga
2023
Variable Energy Cyclotron Centre
2012-2021
Homi Bhabha National Institute
2019-2021
Raja Ramanna Centre for Advanced Technology
2012
The University of Tokyo
1992-2010
RIKEN Nishina Center
2009-2010
National Superconducting Cyclotron Laboratory
2009-2010
Michigan State University
2009-2010
Kyushu University
2009-2010
Influenza A viruses (IAV) are fast-evolving pathogens with a very high mutation rate (2.0 × 10-6 to 2.0 10-4) compared the influenza B (IBV) and C (ICV) viruses. Generally, tropical regions considered as reservoir for IAV's genetic antigenic evolutionary modification be reintroduced into temperate region. Therefore, in connection above facts, present study emphasized on dynamic of pandemic-2009 H1N1 (pdmH1N1) virus India. total Ninety-two whole genome sequences pdmH1N1 circulating India...
Abstract Globally, different genotypes of human adenoviruses are associated with outbreaks acute respiratory infection (ARI) though such evidence is lacking from India. In the present study, we report a sudden increase in positivity adenovirus among hospitalized children ARI Kolkata and surrounding districts West Bengal, India, December 2022 to date. A sharp rise rate was found which ranged 22.1% early 52.6% mid‐March 2023. The overall 40.4% during period 2 <5 years (51.0%) age group were...
ABSTRACT During the coronavirus disease 2019 (COVID-19) pandemic, vast majority of epitope mapping studies have focused on sera from mRNA-vaccinated populations high-income countries. In contrast, here, we report an analysis 164 serum samples isolated patients with breakthrough infection in India during early 2022 who received two doses ChAdOx viral vector vaccine. Sera were screened for neutralization breadth against wild-type (WT), Kappa, Delta, and Omicron BA.1 viruses. Three highest...
Room temperature ferromagnetic ordering has been observed in a rutile TiO2 polycrystalline sample after 4 MeV Ar5+ ion irradiation. The sheet resistance of the irradiated decreases from 107 to 3 × 103 Ω cm−2. Ab initio calculation density-functional theory indicates that both oxygen vacancy (VO) and titanium (VTi) can lead ferromagnetism. However, drastic lowering change colour (from white black) indicate formation VO. Experimental results along with theoretical suggest presence VO plays...
A room temperature ferromagnetic Fe doped ZnO bulk sample has been synthesized by co-doping 2 at% Mn with in ZnO. The final firing for the preparation of Zn0.96Mn0.02Fe0.02O is same as Zn0.98Mn0.02O and this case it found to be 490 °C. It that ferromagnetism a factor 1.6 times more than observed samples. size saturation magnetic field is, however, only 7 nanocrystalline undoped
Coincidence Doppler broadening of the positron annihilation technique has been employed to identify defects in thermally annealed 'as-received' ZnO and ball-milled nanocrystalline ZnO. Results indicate that a significant amount oxygen vacancy created due annealing at about 500 °C above. The results also Zn during ball milling process can be easily removed by sample defect characterization correlated with magnetic properties
ZrO2 samples with 11% Nd and La doping 7, 9, 11, 13% Gd have been prepared by co-precipitation route followed sintering at 700 °C 1100 °C, for potential application as high conductivity electrolytes in solid oxide fuel cells. The characterized x-ray diffraction laboratory source of Cu Kα radiation extended absorption fine structure (EXAFS) spectroscopy measurement Zr K edge synchrotron radiation. XRD spectra analyzed to determine the EXAFS data find out relevant local parameters Zr-O Zr-Zr...
Cholera continues to be a major burden for developing nations, especially where sanitation, quality of water supply, and hospitalization have remained an issue. Recently, growing antimicrobial-resistant strains Vibrio cholerae underscores alternative therapeutic strategies cholera. Bacteriophage therapy is considered one the best alternatives antibiotic treatment. For identification potential phages cholera, we introduced comprehensive comparative analysis whole-genome sequences 86 phages....
The onset of vacuum trigger discharges and microparticle-induced damage has been investigated by bombarding gold tungsten wires with various diameter iron particles using the impact velocity range 2–600 m/s. It was observed that when exceeded elastic limit for extensive craters were produced which had sharp lips. This condition could not be achieved harder targets. measuring light output, electrode damage, voltage waveforms. noted bombardment carried out cathode wire fields in excess 4×107...
$\ensuremath{\beta}$-decay spectroscopy of the proton-rich nucleus $^{24}\mathrm{Si}$ was performed. The decay scheme reconstructed from results delayed $\ensuremath{\gamma}$-ray and proton measurements. We observed two $\ensuremath{\beta}$ branches to bound states in $^{24}\mathrm{Al}$ for first time. branching ratios were determined be $31(4)%$ $23.9(15)%$ ${1}_{1}^{+}$ state at $0.426$ MeV $1.090$ MeV, respectively. observation an allowed transition $1.090$-MeV enabled us firmly determine...
Low temperature photoluminescence and room positron annihilation spectroscopy have been employed to investigate the defects incorporated by 6 MeV H+ ions in a hydrothermally grown ZnO single crystal. Prior irradiation, emission from donor bound excitons is at 3.378 eV (10 K). The irradiation creates an intense narrow 3.368 intensity of this peak nearly four times that dominant near band edge pristine characteristic features indicate its origin as 'hydrogen oxygen vacancy' type defect....
We report the results of EXAFS measurements on undoped and Cr-doped GaFeO3 samples both at Ga Fe K edges various temperatures in regime 25–300 K, to explore changes local structure surrounding cations (viz., Fe) due Cr substitution across its magnetic transition temperature. The along with neutron diffraction studies theoretical simulations establish mechanism lattice a microscopic scale. decrease paramagnetic–ferrimagnetic temperature (TC) saturation magnetization observed increase doping...
A four-rod type heavy-ion radio frequency quadrupole (RFQ) linac has been designed, constructed, and tested for the rare ion beam (RIB) facility project at VECC. Designed cw operation, this RFQ is first postaccelerator in RIB line. It will accelerate A/q≤14 heavy ions coming from source to energy of around 100 keV/u subsequent acceleration a number Interdigital H-Linac. Operating resonance 37.83 MHz, maximum intervane voltage 54 kV be needed achieve final over vane length 3.12 m power loss...
The decay property of $^{20}\mathrm{Na}$ was studied using a $^{20}\mathrm{Mg}$ beam to learn better the onset mechanism rapid-proton process. delayed protons were successfully measured, which correspond one possible ${1}^{+}$ states in $^{20}\mathrm{Na}$. There is no clear beta first excited state above proton threshold, suggesting that this would not be s-wave resonance thermal reaction $^{19}\mathrm{Ne}$+p as expected before. half-life time determined 114\ifmmode\pm\else\textpm\fi{}17 ms....
In this work, we report on experimentally discerning Autler–Townes splitting (ATS) from electromagnetically induced transparency (EIT). Our findings are based a Ξ (ladder) transition 5S1/2→5P3/2→5D5/2 of 87Rb atoms under different laser detuning combinations. Based the ratio power levels two individual and counter-propagating lasers through room temperature Rb vapor cell, experiment categories configuration: types I II. For type I, 5P3/2→5D5/2 is strongly driven, observe EIT. Type II...
Background Limited data exists regarding risk factors for adverse outcomes in older adults hospitalized with Community-Acquired Pneumonia (CAP) low- and middle-income countries such as India. This multisite study aimed to assess associated among aged ≥60 years pneumonia. Methods Between December 2018 March 2020, we enrolled ≥60-year-old admitted within 48 hours CAP treatment across 16 public private facilities four sites. Clinical nasal/oropharyngeal specimens were collected by trained...
A novel experimental approach has been employed for the measurement of $\ensuremath{\beta}$-delayed protons from ${}^{24}\mathrm{Si}$ produced via fragmentation a ${}^{28}\mathrm{Si}$ beam with an energy 100 MeV/nucleon. The secondary was separated by projectile fragment separator RIPS at RIKEN and implanted in 2.6 $\ensuremath{\mu}\mathrm{m}$ aluminum foil placed parallel to gas-$\ensuremath{\Delta}E$ silicon-$E$ detector telescope delayed protons. above arrangement led very clean,...